I have gone to my local optometrist for this. Most have individual glass disks in various diopters to hold up to eyeglasses. Hold one of these above the flip-out magnifier and see how it works for the waist level finder. You can probably do the same for the prism. The optometrist should be able to cut a custom disk for you for less than the cost of the OEM part. I'd go with high refractive index plastic and not glass.

The diopter in the 45 degree prism (at least for the 6000 series cameras but I think its the same except a different base for the Hy6) comes standard labeled as a +1 however its actual optical strength is something more like 8 diopters. I had read this on the photo.net forum and confirmed it by taking my prism to an optician. To summarize - if you need +1.5 diopters correction on the other cameras, then you might need a +2.5 diopter (or a +9.5 optical strength from optician) on the Hy6 Prism. I don't know if the WLF magnifier is the same between the Hy6 and 6008 so can only speak for 6000 series which came with -0.5 diopter magnifying inserts in the WLF. Anyone know if the WLF inserts are the same between Hy6 and 6000 series? If so I may have a few different values.

The diopter in the 45 degree prism (at least for the 6000 series cameras but I think its the same except a different base for the Hy6) comes standard labeled as a +1 however its actual optical strength is something more like 8 diopters. I had read this on the photo.net forum and confirmed it by taking my prism to an optician. To summarize - if you need +1.5 diopters correction on the other cameras, then you might need a +2.5 diopter (or a +9.5 optical strength from optician) on the Hy6 Prism. I don't know if the WLF magnifier is the same between the Hy6 and 6008 so can only speak for 6000 series which came with -0.5 diopter magnifying inserts in the WLF. Anyone know if the WLF inserts are the same between Hy6 and 6000 series? If so I may have a few different values.

The Hy6 manual says the following:

"To allow focusing without eyeglasses, the magnifierof the folding hood can be changed forone making allowance for the wearer´s visualdefect within a range of +2.5 to -4.5 dpt (asreferred to the dioptric value of the wearer).

The 45° Prism-finder gives an upright, rightside-up view-finder image magnified 2.5x andcan be used in four different positions spaced90° apart so that it makes for comfortable viewingeven in awkward shooting positions. As theviewfinder is mounted, its display is automaticallyadjusted for laterally correct presentation.

The 90° High-Eyepoint View-finder gives anupright, right-side-up view-finder image magnified3.4x. Its eyepiece can be easily adjustedfrom +4 to -4 diopters. Its display is automaticallyswitched to laterally correct presentation.The High-Eyepoint View-finder can likewise beused in four different positions spaced 90° apart."

So, in short I do not believe you could exchange the diopter for the 45° prism finder, but it is possible for the other two finders.

Another thought: since the 45° prism finder for the 6008 series can be adapted by F&H to be used with the Hy6 (change of mounting base only), I would tend to believe that both finders are as good as identical.

Just a little correction: the 45° 6008 series prism is (was) actually modified by Sinar. And yes, both are absolutely identical concerning quality.

Best regards,Thierry

Quote from: rolleiflexpages

Another thought: since the 45° prism finder for the 6008 series can be adapted by F&H to be used with the Hy6 (change of mounting base only), I would tend to believe that both finders are as good as identical.